Key information relevant to the recruitment process for the
overall study, such as dates of the recruitment period and locations

No text entered.

Pre-Assignment Details

Significant events and approaches for the overall study
following participant enrollment, but prior to group assignment

No text entered.

Reporting Groups

Description

Lersivirine 500 mg

Two lersivirine 250 milligram (mg) tablets (equivalent to lersivirine 500 mg), a placebo tablet matched to lersivirine and a placebo tablet matched to efavirenz orally once daily along with tenofovir disoproxil fumarate (DF) 300 mg tablet and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in pharmacokinetic (PK) substudy switched to lersivirine morning dosing regimen, received 2 Lersivirine 250 mg tablets, a placebo tablet matched to lersivirine orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. A placebo tablet matched to efavirenz, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Lersivirine 750 mg

Three Lersivirine 250 mg tablets (equivalent to lersivirine 750 mg) and a placebo tablet matched to efavirenz orally once daily along with tenofovir DF 300 mg and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in PK substudy switched to morning dosing regimen, received 3 Lersivirine 250 mg tablets orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. A placebo tablet matched to efavirenz, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Efavirenz 600 mg

Three placebo tablets matched to lersivirine, efavirenz 600 mg tablet orally once daily along with tenofovir DF 300 mg and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in PK substudy switched to morning dosing regimen, received 3 placebo tablets matched to lersivirine and efavirenz 600 mg tablet orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. Efavirenz 600 mg tablet, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Explanation of how the number of participants for analysis was determined.
Includes whether analysis was per protocol, intention to treat, or another method.
Also provides relevant details such as imputation technique, as appropriate.

Intent-to-treat (ITT) population included all randomized participants who had received at least 1 dose of study medication.

Reporting Groups

Description

Lersivirine 500 mg

Two lersivirine 250 milligram (mg) tablets (equivalent to lersivirine 500 mg), a placebo tablet matched to lersivirine and a placebo tablet matched to efavirenz orally once daily along with tenofovir disoproxil fumarate (DF) 300 mg tablet and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in pharmacokinetic (PK) substudy switched to lersivirine morning dosing regimen, received 2 Lersivirine 250 mg tablets, a placebo tablet matched to lersivirine orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. A placebo tablet matched to efavirenz, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Lersivirine 750 mg

Three Lersivirine 250 mg tablets (equivalent to lersivirine 750 mg) and a placebo tablet matched to efavirenz orally once daily along with tenofovir DF 300 mg and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in PK substudy switched to morning dosing regimen, received 3 Lersivirine 250 mg tablets orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. A placebo tablet matched to efavirenz, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Efavirenz 600 mg

Three placebo tablets matched to lersivirine, efavirenz 600 mg tablet orally once daily along with tenofovir DF 300 mg and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in PK substudy switched to morning dosing regimen, received 3 placebo tablets matched to lersivirine and efavirenz 600 mg tablet orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. Efavirenz 600 mg tablet, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Number of Participants With NRTI and NNRTI Resistance-Associated Mutations (RAMs) at Time of Treatment Failure Through Week 24, 48 and 96

Measure Description

Phenotypic resistance and genotypic resistance was assessed for all participants at Day 1 predose, and was evaluated for nucleotide reverse transcriptase inhibitors (NRTIs), and non-NRTIs (NNRTIs) resistance-associated mutations at time of treatment failure using Monogram GenoSeq and/or PhenoSenseGT assays. This was then repeated for all participants with HIV-1 viral load more than 500 copies/mL at treatment failure, up to Week 96.

Time Frame

Day 1 (pre-dose) through Week 24, 48, 96

Safety Issue

No

Population Description

Explanation of how the number of participants for analysis was determined.
Includes whether analysis was per protocol, intention to treat, or another method.
Also provides relevant details such as imputation technique, as appropriate.

Virology analysis set (TLOVR50 failures) included all participants who meet the TLOVR50 failure definition. Here 'N' (number of participants analyzed) signifies participants evaluable for this measure and ‘n’ signifies participants evaluable for this measure at specified time point for each group, respectively.

Reporting Groups

Description

Lersivirine 500 mg

Two lersivirine 250 milligram (mg) tablets (equivalent to lersivirine 500 mg), a placebo tablet matched to lersivirine and a placebo tablet matched to efavirenz orally once daily along with tenofovir disoproxil fumarate (DF) 300 mg tablet and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in pharmacokinetic (PK) substudy switched to lersivirine morning dosing regimen, received 2 Lersivirine 250 mg tablets, a placebo tablet matched to lersivirine orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. A placebo tablet matched to efavirenz, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Lersivirine 750 mg

Three Lersivirine 250 mg tablets (equivalent to lersivirine 750 mg) and a placebo tablet matched to efavirenz orally once daily along with tenofovir DF 300 mg and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in PK substudy switched to morning dosing regimen, received 3 Lersivirine 250 mg tablets orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. A placebo tablet matched to efavirenz, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Efavirenz 600 mg

Three placebo tablets matched to lersivirine, efavirenz 600 mg tablet orally once daily along with tenofovir DF 300 mg and emtricitabine 200 mg tablet orally once daily, in the evening up to 96 weeks. Participants enrolled in PK substudy switched to morning dosing regimen, received 3 placebo tablets matched to lersivirine and efavirenz 600 mg tablet orally once daily in the morning for 7 days prior to Week 4, and in the morning and evening on 1 day following Week 4. Efavirenz 600 mg tablet, tenofovir DF 300 mg tablet and emtricitabine 200 mg tablet were continued in the evening in PK substudy. Evening dosing was continued for the remainder of the study up to Week 96.

Measured Values

Lersivirine 500 mg

Lersivirine 750 mg

Efavirenz 600 mg

Number of Participants Analyzed
[units: participants]

5

8

6

Number of Participants With NRTI and NNRTI Resistance-Associated Mutations (RAMs) at Time of Treatment Failure Through Week 24, 48 and 96
[units: participants]

Week 24 (n=3, 4, 2)

3

0

1

Week 48 (n=4, 3, 3)

3

1

1

Week 96 (n= 5, 8, 6)

3

1

1

No statistical analysis provided for Number of Participants With NRTI and NNRTI Resistance-Associated Mutations (RAMs) at Time of Treatment Failure Through Week 24, 48 and 96

10. Secondary:

Number of Participants With Laboratory Test Abnormalities [ Time Frame: Baseline up to Week 96 or early termination ]